Topaz and Erythrite Physical Properties
Tenacity
Not Available
  
Sectile
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.49-3.57
  
3.06
  
Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
  
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
  
Cleavage
[001] Perfect
  
Perfect on {010}; poor on {100} and { 1 02}.
  
Mohs Hardness
8
  
Not Available
  
Chemical Composition
Al2SiO4(F,OH)2
  
Co3(AsO4)2•8(H2O)
  
Topaz and Erythrite Chemical Formula
While comparing Topaz and Erythrite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Topaz and Erythrite chemical formula.
- Chemical formula of Topaz- Al2SiO4(F,OH)2
- Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Topaz and Erythrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Topaz and Erythrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Erythrite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 3.06 whereas that of Erythrite is 3.06.